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Instructions for use
®
FORESTACRYL
1. Purpose
FORESTACRYL® is a cold polymerizing synthetic material for manufacturing appliances for orthodontic
treatment.
2. Application
Securing retention and regulation elements for manufacturing removable treatment appliances.
3. Material
FORESTACRYL® Liquid (monomer) consists of methyl methacrylate (MMA).
FORESTACRYL® Powder (polymer) consists of polymethyl methacrylate (PMMA).
Observe the safety data sheet during application.
4. Contraindication
If there is a known allergic reaction to plastics, a particular allerg related to methyl methacrylates
(MMA, PMMA) must be excluded.
5. Setting up
Attaching the retention or regulation elements by way of waxing.
Insulate the model in accordance with the processing instructions of the manufacturer of the
orthodontics insulating agent.
Remember that the model is watered thoroughly and ideally still slightly moist, otherwise bubbles
will form when the plastic polymerizes.
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6.1 Spray method
Fill the sprinkle bottle - order no. 416-0001 - with eective aluminium spray nozzle - order no. 416-1000 - with
powder and the spray bottle - order no. 416-0010 with liquid. If colouring is desired, add colour concentrate
to the liquid according to the required colour intensity. Then hold the model at an oblique angle, spray on
the powder and cover with the appropriate amount of liquid. Repeat this until the required plate thickness
is achieved (please note the maximum mixing time of 9 minutes). The FORESTADENT expansion screws are
coated with a thin microlm layer. This guarantees that the screws are easy to undo after polymerisation. It
is therefore important to ensure that the screws are not cleaned before use. After the acrylic layer has dried,
the plates must be polymerised in a pressure vessel at 2.5 bar / 36 PSI in water at approx. 55 ° C for about 20
minutes.
Re. 6.1 Method A – Spray method
max. 9 min
22°C
21
2.5 bar / 36 PSI
55°C
20 min
6.2 Doughing
We recommend using a mixing bowl. The mixing ratio requires 8 ml liquid to 16.8 g (24 ml powder). Carefully
stir the powder into the liquid for 20 seconds so that the mixture is as free of bubbles as possible (please note
the maximum mixing time of 9 minutes and the room temperature of 22 ° C). Apply the viscous mass to the
previously moistened plaster model. Hold the model at an angle, adjust as needed as you pour on the liquid
to the desired thickness. The now starting second phase enables the dough-like rm acrylic to be shaped on
the model (6 minutes maximum working time). After the polymer material has dried, the model must be
polymerised in a pressure vessel at 2.5 bar / 36 PSI in water at approx. 55 ° C for about 20 minutes. Start of
polymerisation (slight heat) after 14-15 minutes, nal temperature (hot) after approx. 16-18 minutes.
Re. 6.2. Method B – Doughing
1 2
8 ml : 16,8 g
4
3
22°C
20 sec
22°C22°C 22°C
9 min
5
6
max. 6 min
2.5 bar / 36 PSI
55°C
22°C
20 min
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7. Final design
FORESTACRYL® Synthetics can be processed with milling and polishing tools for plastics technolog that are
commonly used in orthodontics. Please consider the appropriate protective equipment (face protection / eye
protection).
8. Water storage
In order to reduce the residual monomer content, the application must be kept for several days in a closed
refrigerated container immersed in water (3 days).
9. Cleaning and care instructions
The appliances can be cleaned with toothpaste and a toothbrush. Other cleaning agents: soap, curd soap, liquid
soap and detergent; rinse well with water after cleaning. Do not use strongly fragranced soaps.
Disinfection with standard disinfectants for orthodontic synthetics is possible. Observe the manufacturer‘s
instructions of the disinfectant manufacturer.
10. Warnings and caution
• FORESTACRYL® is only recommended for the above-mentioned applications.
• FORESTACRYL® may only be handled and used by trained specialist personnel.
• The product must not be used if there are any known hypersensitivities and a risk of possible allergic
reactions to methyl methacrylate.
• If there are complications, countermeasures must be taken, e.g.: Remove the product and choose
alternative treatments, if necessary.
• For single use only.
• Observe the storage instructions.
When the products are used, the appropriate safety measures must be taken in accordance with the safety
data sheet.
11. Storage and durability
Store FORESTACRYL® in a cool and dark place to avoid premature polymerization.
When using, protect against contamination by foreign substances such as dust etc. and immediately close the
container.
Observe the limited durability - see date on the label.
12. Material specications
• Contains methyl methacrylate and ethylene dimethacrylate.
• Contact may cause skin irritation and allergic reactions.
• Fumes may cause eye and respiratory irritation.
• Wear eye, face and hand protection during handling.
• Observe the safety data sheets for the product.
13. Disposal
Comply with regional or national regulations, taking into account the information in the safety data sheet.
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Bernhard Förster GmbH
Westliche Karl-Friedrich-Straße 151 · 75172 Pforzheim
Tel.: + 49 7231 459-0 · Fax + 49 7231 459-102
[email protected] · www.forestadent.com
ZDRUCK330 10/2019
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